Earlier on Wednesday, a new report prepared for the U.S. Congress revealed that neither the U.S. nor Israel knows exactly where all of Iran’s nuclear facilities are.

The report by U.S. congressional researchers says that Iran's “workshops” for making nuclear centrifuges and components for the devices are widely dispersed and hidden.

Analysts for the Congressional Research Service wrote in the report that neither Israel nor the U.S. is certain of the locations of all such facilities. The report is based on interviews with current and former U.S. government officials familiar with the issue who were not identified.

Negotiations between Iran and the group of P5+1 – consisting of the five permanent members of the UN Security Council and Germany – are expected to resume in April.

Tehran signaled ahead of the talks that it is willing to allow “permanent human monitoring” of its nuclear sites and “full transparency” if the West agrees to sell it enriched uranium and provide civilian nuclear assistance.